Worcester Bosch Refractory Brick Target Plate 87161004870

The Worcester Bosch 87161004870 is a refractory brick target plate supplied for Worcester Bosch oil-fired boilers. It sits in the combustion chamber, where the refractory material shields the surrounding metalwork from the flame and helps hold heat in the firing zone. Because the brick face erodes and cracks with use, it is treated as a service item and replaced during burner and combustion checks.

• Visible cracking, crumbling or spalling across the brick face
• Broken pieces of refractory material found inside the combustion chamber
• Sooty or unstable flame pattern with poor combustion readings
• Localised overheating or discolouration of the chamber behind the brick
• Flame impingement on the chamber walls or a change in burner noise

• Confirm the appliance model and serial number against the compatibility list before ordering.
• Check the marking on the old brick; earlier builds may carry SMP3741/2 or 1013369.
• Inspect the combustion chamber seals and gaskets while the boiler is open and replace any that are perished.
• Combustion chamber work on an oil boiler should be carried out by a competent engineer.